Rotary motor.



No. 704,943. Pae'nted lilly l5, i902.

D. F. SMITH. RorAn'Y moron.

(Application led June 7, 1902.) (No Model.) 3 Sheets-Sheet I.

f ymmhm iflmeooeo Patented luly l5, |902.

l D. F. smTH.

ROTARY MOTOR.

(Application filed June '7, 1902.)

(No Model.) 3 Sheets-Sheet 2.

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(Application led June "l, 1902.]

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' UNITED STATESA PATENT EEICE.

DANIEL E. SII-1TH, 0E NEW YORK, N. Y;

FiOfT'ARY IVI OTO R.

SPECIFICATION forming* part 0f Letters Patent NQ. 704,943, dated July15, 1 902.

Y Application iiled une '7, 1902. Serial No. 110,630. (No model.)

To all whom it. may concern:

Be it known that I, DANIEL F. SMITH, acitizen of the United States,residing in the borough of'Manhattan, city of'NeW York, State of NewYork, have .invented a certain new and Improved Rotary Motor, of whichthe followingis a specification. l Y

Thisl invention comprises the employment of a piston traveling inacircular path in a proper chamber a-nd anannular-ring abutment travelingin; a circular path eccentric to that of the piston, the organizationbeing such that at certain points in the movement the piston crosses thering abutmentnvhich at all tims'acts as'an abutmentfor the continuousprogressivejrotation of the piston. So far as I am awareamovementof thischaracter is novel.v

In the accompanying drawings, Figure 1 is a general longitudinalvertical section, but with some of the parts in alevationg-Fig, atransverse sectionon the line 2 2 of Fig. l; Fig. 3, a similar sectionon the line 3 3 of Fig. 1; Fig. 4, an elevation of a portion of one ofthe rotating end'. plates of the motor; Fig. 5, an elevation of theinner face ofthe circular member carrying the piston and showing asection ofthe shaftinwhich it is mounted; Fig. 6, asideelevationthereof; Fig. 7, a detachedv perspective view of theabutmentring; Fig. 8, a View, partly in elevation .and partly insection, of the main shaft; Fig. 9, a section onthe line') 9 of Fig. 8;Fig. 10, a section on the line 10 104 of Fig. 8; Fig. 11, a longitudinalsection of the end of the main shaft and-somerelated parts; Fig. 12,a-section on the line 12 12 of Fig. 1; and Figs. 13, 14., and 15 aresectional views of a diagrammatic character, illustrating the mode ofoperation of the rotary piston and eccentricallyrotating .abutment-ring.

' The principle of operation of this motor may be understood in ageneral Way by reference to Figs. 7, 13,14, and 15.

A is the stationary body of the-motor,hav ing an annular chamberA',a'round which the piston B is driven by steam or other-fluid underpressure admitted iuranyappropriate way.

C is the eccentrically-rotating abutmentring. If the piston Bandabutment-ring be rotated in unison and steam be taken, for instance, onrthe upper side of the piston, as

viewed in Fig. 13, it will be perceived that the ring, which crosses thepath of the piston at the left-hand side of Fig. 13, will act as anabutment. willintersect the abutment-ring thelatter is cut away ornotched at C', and through this opening the piston passes, as seeninFig. 14.

" The abutment-ring-'closes the annular chamber Al behind the piston,which being still propelled by steam taken on the same side againcrosses the abutment-ring, as seen at the left-hand side of Fig. 15. Inthis Way continuous rotation is imparted to the piston tionary part orvbody A,is a projection from the face of the circular .plate B', whichhas also an annular Bange B2, including the base of the piston, whichprojects into the chamber'A'.-4 This flange aswell as the pistonand theWalls ofthe chamber are preferably tapered, as indicated in Fig.l 1. Thepart B is fast to the shaft l) and has steam-ports b b on each side ofthe pistonconnected`by passages?)2 with separate steam-passages bi inthe shaft. The two motors'XYare coupled by an annular casing E, havingradial langeslbolted to the respective body-pieces A. 1 Around thecentral part of the shaft and between the ends of the hubs B3 of thepartsB B is an` annular chamber into which steam-admission ports d d inthe shaft open, respectively, from-the passages Z13 b3 in the shaft.AAroundthe shaftis applied a lon gitudin'alislidin g reversing-valve F,splined to the'shaftfand loosely embraced by a ring or sleeve F', seatedin an annular groove F2, Fig. 8, in the valve .and engaged by one end ofa bell-crank lever, to the other end of which is connected 'a rod,fpassing through a suitablestuffing-box, having its outer end connectedwith a hand-lever F3. In the valve F are openings f f, by means of Atthe point Where the pistonv IOO which eitherof the ports d or d may beopened to the annular chamber, which is supplied with steam through apipe E'. In this or any other appropriate Way steam may be admittedcontinuously to either side of the piston B to effect its continuousrotation in either direction, suitable provision for exhaust being made.

Contiguous to the outer face of the bodyA and fast upon the shaft is anend plate Gr, having in its inner face a radial slot or groove G', Figs.1 and 4. Into this slot projects a pin g, extending from the edge of theabutment-ringO. Theabutment-ringistherefore rotated in its annular seatformed in the body A, partly within the annular piston-chamber A andpartly in the portion lying outside of such annular chamber, as clearlyseen in Figs. 2 and 13 to 15. It will be observed that the abutment-ringtraveling in the annular seat formed in the body part is held at oneedge oy the end plate G and at the other by the face of the flange B2 ofthe piston member. The two motors X Y are placed at an angle to eachother of one hundred and eighty degrees, and the steam-pressure upon therigidly-coupled piston members B' B is neutralized. Steam may beexhausted at the proper time from the two parts or sections of theannular piston-chamber A', lying, respectively, within and outside ofthe eccentrically-disposed abutment-ring. Opposite ends of the portionof the chamber A lying outside of the abutment-ring are connected bypassages H l-I'. which communicate with an exhaustchamber H2, opening toan exhaust-pipe H3. Within this exhaust-chamber is a rocking valve h,actuated by a rod h', attached to a pivoted hand-lever 71,2, by means ofwhich the valve h may be rocked to close either exhaustpassage H or II',according to the direction in which the engine is running. To provide asuitable exhaust from that part of the chamber A lying within theeccentric abutmentring, the following arrangement is shown: Oppositeparts of this portion of said chamber are respectively connected bypassages I I' with annular exhaust-chambers it", formed as annulargrooves in the body A in the bearingsurface for the shaft D. At thispoint the shaft is hollow and is formed with apertures 213, opening tothe .annular exhaust-chambers t' i'. Within the hollow end of the shaftis splined a longitudinally-sliding hollow exhaust-valve K, having in itan exhaust-opening le and normally pressed outwardly by a spring K. Inthe outer end of the valve K is fixed a radially-projecting bolt orstud-axle M, which passes through a slot in the hollow shaft and hasapplied to its outer end a roller m, that travels upon a cam-face N,Figs. 1 and 12, on a circular` plate N', applied loosely around thehollow end of the shaft and having opposite segmental grooves n, throughwhich bolts n pass and are screwed into the standards O, in which theshaft has its bearings. On a shaft P, extending between the base part ofthe body and the standard O, is a rocking sleeve P', havingaradialprojection, to which is connected a rod P2, to the end of which isapplied a hand-lever P3. From the rockshaft extends a toothed segment Q,which engages corresponding teeth q on the cam-plate N. Obviously bymanipulation of the lever P the cam-plate N may be partially rotated, sothat the cam-surface thereon may be adjusted to properly coperate withthe springpressed exhaust-valve K to exhaust at proper times from thatpart of the piston-chamber A lying within the eccentric abutment-ring.

I have shown my invention organized in what is deemed by me to be asuitable and practicable form. Obviously, however, the details ofconstruction may be varied without departing from the principle of theinvention or its general mode of operation.

I claim as my invention- 1. A rotary engine comprisinga piston travelingin an annular steam or pressure chamber `and a movable abutmentringeccentrically disposed so as to divide the pistonchamber into two partsand within which the axis of the piston-chamber is located, the abutment-rin g and piston being so constructed and operated that thepiston may pass across the ring at the required point.

2. A rotary engine comprising an annular pressure piston-chamber, apiston traveling therein, and a rotating eccentrically-disposedabutment-ring intersecting said chamber at two points and formed with anotch through which the piston passes, and within which the axis of th'episton-chamber is located.

3. A rotary engine comprising a stationary body portion having thereinan annular piston-chamber with converging side walls, a piston-carryingmemberhaving a correspondingly-tapered piston extending to the bottom ofsaid chamber and a correspondingly-tapered ange extending partlyinto thechamber, an eccentrically-disposed notched abutment-ring traveling in aseat or bearing in the body portion and intersecting said chamber at twopoints, and means for rotating the abutment-ring in proper unison withthe piston.

4. A rotary engine comprising a body-piece having an annularpiston-chamber, a pistoncarrying member having a piston occupying saidchamber and a flange part closing the vchamber' and a notchedeccentrically-disposed abutment-ring traveling in a seat in the bodypart and held in position by the face of the flange on the piston memberand within which the axis of the piston-chamber is located, and meansfor rotating the abutment-ring in unison with the movement of the pistonfor the purpose described.

In testimony whereof I have hereunto subscribed my name.

DANIEL F. SMITH. Witnesses:

EDWARD C. DAVIDSON, KATHARINE MACMAHON.

IOO

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